如果以杀毒软件为的主要收入来源的公司推出的产品没有足够的特色及完善的服务来抗衡微软的杀毒软件。

If the antivirus software as the main source of revenue for the company's products do not have enough features and the quality of services to counter Microsoft's antivirus software.

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而微软的免费杀毒软件因为可以大大减少用户的成本而受到欢迎。

And Microsoft's free anti-virus software because users can greatly reduce the cost and be welcomed.

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